Corner bead shears



Nov. 22, 1966 POTTER ETAL 3,286,347

comma BEAD SHEARS Filed June 12, 1964 INVENTORS B5 2.1- L. DoT-ve R.

STANFORD E. WARRENBUEG- ATTORNEY United States Patent 3,286,347 CORNER BEAD SHEARS Bert L. Potter, 5211 Massachusetts Ave., Indianapolis, Ind, and Stanford E. Warrenburg, 150 S. John St., Bloomfield, Ind.

Filed June 12, 1964, Ser. No. 374,595 1 Claim. (Cl. 30229) This invention rel-ates to a shears for cutting metal corner beads, such as are used in dry wall construction.

At present, the cutting of corner beads, or like job, is laboriously done, in a time-consuming manner, by using either an ordinary metal shears, or by the use of a hacksaw, cutting successively the flanges of a bead and then breaking the radius. These methods cannot be relied upon to produce other than distortions of the desired angle and radius, and loss of time and material.

The primary object of the present invention is the provision of a shears, by the use of which cor-ner beads can be quickly and accurately cut in a single smooth shearing operation, thereby eliminating the above outlined difi'iculties and loss of time.

In the drawings:

FIGURE 1 is a side elevation of a shears of the present invention, shown in open position, showing a corner bead, in phanton lines, in place to be cut;

FIGURE 2 is a left-hand elevation of FIGURE 1;

FIGURE 3 is a horizontal section taken on the line 33 of FIGURE 1;

FIGURE 4 is a fragmentary side elevation of the reverse side of FIGURE 1; and,

FIGURE 5 is an elevation of the reverse side of FIG- URE 1, showing the shears closed for storage.

Referring in detail to the drawings, the illustrated shears comprises a pair of crossed and pivoted handles, consisting of elongated and outwardly bowed handles A and B, which have rounded rear ends 10.

The handle A has a forwardly flaring portion 12, at its forward end, 'Which overlies a similar portion 14, on the handle B, the portions 12 and 14 being traversed by a pivot bolt 16, having a lock nut 18 thereon, with a washer 20 interposed between the nut and the adjacent side of a handle.

The portion 12 of the handle A merges into a laterally and forwardly angled jaw 22, which has a convexly inward edge 24, continuous with the convexly curved edge 26 of the portion 12 of the handle A. The jaw 22 has a straight rear edge 28 which is disposed at a slight obtuse angle to the longitudinal centerline of the handle A. The portion 12 terminates in an edge, extending between the edges 24 and 28, which is composed of an outer straight edge portion '30 and an inner straight edge portion 32. These edge portions are both disposed at different acute angles to the straight rear edge 28. The edge portion 30 is angled forwardly and downwardly, relative to the edge 28. The edge portion 32 is angled rearwardly and downwardly, relative to the edge 28.

The outer side of the jaw 22 is angularly reduced, as indicated at 34, to the edge portion 30, so as to produce a sharp edge portion 30, and similarly angularly reduced, as indicated at 36, so as to provide a sharp edge portion 32. The inner surface 38 of the jaw, as seen in FIGURE 2, is fiat. The outer sideof the jaw 22 is similarly angularly reduced, as indicated at 40, toward the rear edge 28, so as to provide a sharp edge 28.

The flaring portion 1 4 of the handle B merges into a convexly curved jaw 42, whose inner edge is indented by a V-shaped notch 44, at whose apex an approximately twothirds circular recess 46 is formed. The sides 48 and 50 of the notch 44, provide severally, abutments for the flanges 52 and 54 of a corner head, while the recess 46 provides a friction seat for the semi-tubular member 58 of the bead, as shown in phantom lines in FIGURE 1.

The outer surface '60 of the jaw 42 is angularly cut away, as indicated at 62, toward and to produce a sharp straight edge 64, which extends between the outer notch side 48 and the tip 66 of the jaw 42. The edge 64 is disposed at an acute upward and forward angle relative to the notch side 48. I

The handles A and B, are tensioned away from each other, toward the open position shown in FIGURE 1, by means of a V-shaped wire spring 66, which has a coil 68, midway between its ends, and outwardly bolwed arms 70. The arms 70 subtend major portions of the lengths of the handles, and are suitably fixed, at their rear ends, as indicated at 72, to the inner surfaces of the handles, at points near to and spaced forwardly from the rear ends 10 of the handles.

Means for retaining the handles in closed position, for compact storage and preservation of the cutting edges of the shears, comprises a hook 74, pivoted, as indicated at 76, to the outer side of the handle B. The hook has a forwardly and downwardly curved crook 78, which is adapted to be engaged forwardly over a headed pin extending from the outer side of the handle A, in front of the spring 66.

In operation, a corner bead being in place in the notch 44 of the jaw 42, closing of the handles toward each other produces initial shearing engagement of the edge 28 of the jaw 22, with the rear flange 52 of the corner bead, followed by shearing engagement of the edge 32 therewith and with the member 58 of the corner bead, followed by shearing engagement of the edge 30 with the outer flange 52 of the corner head; all in cooperation with the edge 64 of the jaw 42, which passes the edges of the jaw 22 in succession, as indicated in phantom lines in FIGURE 5. The result is an accurate, exact, and clear severance of the corner bead, produced in one smooth closing of the handles A and B.

It will be understood that, by reason of the presence of the recess 46 and the notch sides 48 and 50, holds the corner bead, not only against shifting during the beginning of the shearing operation, but positively prevents distortion of the corner bead throughout the severance thereof.

What is claimed is:

A shears for a corner bead having a tubular member and angularly divergent flanges, said shears comprising first and second crossed and pivoted handles, a first jaw on the forward end of said first handle, said first jaw having multiple shearing edges disposed at different angles relative to each other, each of said shearing edges being straight, a second jaw on the forward end of said second handle, said second jaw being formed with a notch shaped to conformably-receive a corner head, said second jaw having a single shearing edge located forwardly of the notch, said second jaw shearing edge being substantially straight and adapted to come into shearing relationship with at least one of said multiple shearing edges as the handles are closed for cutting a corner bead present in the notch, the length of the single shearing edge of the second jaw being substantially shorter than the combined lengths of the shearing edges of the first jaw, said notch being formed at its apex with an arcuate recess adapted to be frictionally engaged by the tubular member of a corner bead.

References Cited by the Examiner UNITED STATES PATENTS 1,179,807 4/1916 Crothers 30-262 1,507,225 9/1924 Barrett 30-249 2,951,289 9/1960 Ferbrache etal 30-262 WILLIAM FELDMAN, Primary Examiner.

J. C. PETERS, Assistant Examiner. 

